Paper-bag-bottoming machine



Mar. 27;" 1923. 1,450120 J. W. TAGGART PAPER BAG BOTTOMING MACHINE Filed Nov. 4, 1921 2 sheets-sheet l Mar. 27, 1923. 1,450,120 A J. W. TAGGART PAPER BAG BOTTOMING MACHINE Filed Nov. 4, 1921 2 sheets-sheet 2 5 flm w/m Patented Mar. 27, 1923.

UNITED STATES JOSEPH W. TAGGART, OF WATER/DOWN, NEW YORK.

PAPER-BAG-BOTTOMIN'G MACHINE.

Application filed November 4, 1921.

To all whom'z't may concern Be it known that I, JOSEPH WV. TAGGART, a citizen of the United States, residing at WVatertown, in the'county of Jefferson and State 'of New York, have'invented certain new and useful Improvements in Paper- Bag-Bottoming Machines, of which the following is a specification.

Thisinvention relates to a machine for forming and pasting the ends of paper bags, and has for its object to provide novel and simple means for carrying out this work. A particular object is to provide novel, simple and positive mechanism for folding the flaps of the bottom ends of the bags after the same have been pasted, the said folder consisting mainly of a rocking member, which is actuated by certain of the bag feeding parts, by which the proper timing of the member is effected, and a novel and peculiar camguide which effects the rapid and positive folding of one of the end flaps.

The various features and parts of the invention will be understood from the'detailed description which'follows and by reference to the accompanying drawings, in which Figure 1 is the front side elevation of the machine to which my improvement is'applied; certain nonessential parts being omitted. Fig. 2 is a diagrammatic view'of the cam-guide; showing the different positions of the rocking member during the flap-folding operations. Fig. 3 is a view of the tube from which the bag is made; showing the bottom end slitted preparatory to being folded. Fig. 4 is a view showing the partial folding of the bottom-end of the bag. 5 is a rear-end view of the'machine; showing the flap-folding mechanism in various positions; also showing "the progress of the bag through the machine. Fig.6 is a fragmentary view; showing the final operation of the flap-folding parts. Fig. 7 is a sectional view of the eccentric which operates the rocking member. view of the adjustable lever which actuates the rocking flap-folder. And Fig. 9 is a view of the bag after the pasted end-flaps have beenfolded.

In the drawings, 2 and 2 represent the spaced, preferably annular, frame portions which are mounted vertically upon legs 2.

Thesesections of the frame are each braced by similar radialarms. 2 which converge at the'center of the said members, and are bored out axially to provide bearings for the Fig. 8 is a sectional Serial no. 512,783.

opposite ends of a shaft 3 that supports the" main cylinder or drum 3, which receives and carries the bags 4: from the time they are slitted by a pair of rolls 5-5, until the folding and pasting of the bottom ends of the bags are completed and delivered to the usual feed and press rolls 6 and 7-7. 8-

represents the operators table, upon which the plain tubes 4 are stacked, and from which the tubes are fed singly, as indicated by the dotted line 4:, in Fig. 1. The tubes 4:

first pass between a pair of feed rolls '8', which direct the tubes toward the slitter rolls 55. tube 4: is carried downwardly bottom end foremost between the roll 5'and the drum 3.

Upon reaching the pointindicated'by the After leaving the slitter the arrow 4", the bottom end ofthe bag is partially folded, as shown in F ig. 4, bya well-' known mechanism, which is not shown.

When the bottom-end of the bag progresses to the arrow 49', paste is applied to the flaps 4 and 4 by another mechanism(not shown). The bag. 4 is then carried a short distance and encounters a device 9, which creases-the bottom near the base of the flap 4', as shown at 4 in Fig. 4. This creasing is necessary to facilitate the folding of the flap inwardly upon the central or diamond shaped portion 4 of the bag. The foregoing operations are common to bag-ending machines, and .the'

mechanisms for carrying out this preliminary work have not been shown in detail.

The further rotation of the drum 3 (in the direction of the arrows shown thereon),

from the'creaser 9, carries the partially folded bag, shown in Fig. 4. around to the positioned slightly above the horizontal center of the drum and pointstangentially in theopposite direction, as shown by the full' lines in Fig. 1. and by the dotted lines in Fig. 6, where a device 9 creases the bottom at line 4 (Fig. l). The folding of the flaps al and 49 is effected while the bag-is being carried from the last described position to the feed rolls 6, by a novel mechanism which:

will now be described in detail:

The press roll 7, is mounted upon ashaf-t 7 the latter being-supported by upright bearing brackets 7 and 7,which are mount- 'edrespectively on the annplar frame sec tions 2-2. The bracket 7 is provided with a hollow boss 7, into which one end of the shaft 7 protrudes, and upon this end of the shaft 7 a is rigidly mounted a disc 7 which is provided with an eccentric pin 7,

as shown in Figs. 1, 5 and 7. 10 represents .a rocking lever, which is pivoted by a pin 10 to a lateral projection 7* of the boss 7 The lever 10 has a longitudinal groove 10 facing the disc, in which the pin 7 is disposedv and plays, for rocking the free end of the lever 10in a vertical plane, as shown by the full and dotted lines in Figs. 1, 5 and 7, by the rotation of the disc 7 The underside of the free end of the lever 10 is provided'with a forked perforated lug 10 in which is pivoted the upper end of a link 11, the bottom end of the said link being pivoted in the forked free end of an adjustable rocking lever 12, by pins 11. The lever 12 is slotted at 12 for adjustably receiving the reduced end of a shaft 13, which is supported by bearings 13 mounted rigidly on the frame sections 2--2'. On this end of the shaft 13, isrigidly mounted a sleeve 13, which is slotted diametrically to slidably receive the lever. 12, the said lever being held in place in the said slot by means of a washer 13 and aunt 13. By this construction and arrangement the rotation of the disc 7 effects the simultaneous vertical rocking of the ,levers 10- and 12 as shown by the full and dotted lines in Figs. 1 and 5, and this correspondingly partially rotates the shaft 13. The folding of the flap 4 of the bag is effected directly by the following parts: -1 4-1'4' represent forwardly projecting spaced arms, whose outer and heavier ends are ri idly secured to the shaft 13, by clamps 14.' hese arms are disposed parallel to each other and their inner reduced ends are tied together by a shaft 14", which journals in the said ends. To one end of the shaft 14 is rigidly fitted a short upright lever 14, whose free end supports a roller 14 The roller 14 is constantly in engagement with an upright cam-guide 15 of peculiar shape, which is best shown in Figs. 1 and 2. The bottom end of the guide 15 is made rigid to the frame 2 by a bolt 15, while the upper end of the said guide is rigidly supported by an upright arm 16, whichis r1gidly secured to one of the radial bars 2 by a bolt 16; the connection between the arm 16 and the guide 15 consists of a rod or bolt 16. The shaft 14 carries an uprightradial wing or paddle 14, which engages the flap 4 of the bag 4 and directly effects the folding of the said flap. The wing 14 is movable with the shaft 14 when the latter is partially rotated by the action of the roller 14 over the irregular track presented by thecam-guide 15. These various movements of the wing 14 are necessary for the proper folding of the flap 4,

which mustbe swung in substantially a half circle between the start and the finish of the folding operation, which will now be described: A-few seconds in advance of the arrival of the bag 4 at the position shown at the left side of the drum 3 in Figs. 1 and 6, the rocking arms 1414, and shaft 14 and related parts, are moved to their lowest operative position, shown by the full lines in Fig. 1, and by the lowermost dotted lines in Figs. 2 and 6, ready to begin the folding. This positions the roller 14 near right of the depending flap 4.. The next upward movement of the arms" 14 to the position 5 drives the roller 14 around the.

This

abrupt bend 15 of the cam-guide. rocks the shaft 14 in the opposite direction and tilts the wing 14 leftwards into engagementwith the under side of the flap 4 and swings the said flap outwardly substantially to the horizontal position (see Fig. 1). The wing 14 and flap 4- continue in the last described relation while the arms 14 are swung to the dotted position 0. In the meantime the roller 14 travels over the plane surface 15 of the cam-guide and partially rounds theupper abrupt curve 15 of the guide. vThis again carries the said roller slightly to the right and correspondingly rocks the shaft 14 and the wing 14 towards the right. The flap 4 then inclines.

in the opposite direction, towards the drum, and'begins its final folding movement, and

when the arms 14 are being moved to their highest position, the roller l4 is moved. still further towards the right and rideson the upper plane surface of the guide. During this final upward movement of tllQ TOCklIlg members 14, the wing 14 is swung'farther and farther towards the right by the rec'ed-- ing of the free ends of said arms which rotate on the axis 13 until the wing 14 forces theflap 4 tightly against the diamond shaped bottom portion 4 of the bag to which it adheres. At almost the same in-, stant, the flap 4, having progressed to the same extent, comes into contact with ,a stationary guard 17 and is folded downwardly H in the opposite direction upon the flap 4. This, completes the folding. of the several bottom end-portions, as shown in Fig. 9. The guard 17 is rigid on a rod 17 is supported by a bracket 17 as best seen in Figs. 1 and 6. At the end of the folding which it operation just described, the bag 4 passes between the feed rolls 6, and thence through the press rolls 7-4, by which it is discharged from the machine, as shown by the dotted line 4, at the left in Fig. 1. The several bends of the cam-guide are fashioned and spaced and the timing of the parts 10-12 14 and 14 are so arranged as topositively fold the flap l -a fraction of a second in advance of the final folding of the overlaying flap 4. 14 represents a tension spring which connects with the arm 14- and with the bottom-end of the lever 14. This spring exerts its tension for resiliently holding the roller 1 in constant engagement with the cam-guide 15. The bags 4 travel through the machine at a very rapid gait and as the bags are made to hug closely the face of the drum 3, which rotates on a different axis than the arms lat-14, the said arms must be operated in faster time, in order that the wing let may perform its variable movements, as described. When properly constructed and adjusted my flap folding mechanism operates continuously for long intervals without failure and enables me to operate the bag-ending machines at higher speed and with greater accuracy and economy than any of the older machines of the class known to me.

The shaft 7 carries a gear 18 which is driven by a gear 19 (see dotted lines in Fig. 1) the latter being mounted on a shaft 19, to one end of which is fitted a pulley 19 which is driven by a belt 19". The opposite end of shaft 19 is fitted with a hand- .wheel 19 b which the Various )arts of the machine may be rotated manually. The gear 18 drives a similar gear 18 mounted on. a shaft 18 which carries the rolls 7. The lowermost feed roll 6 preferably drives the drum 3 by a suitable gearing (not shown.)

Having thus described my invention, what I claim is 1. In a device for folding the end flaps of paper bags, the combination with the drum which carries the bags through an ending machine, and the power driven press rolls which receive the bags from the drum, of a disc mounted on the shaft of one of said press rolls, said disc having an eccentric pin, a pair of levers rocked by said pin, a pair of arms adapted to be rocked by said levers, a rockable wing carried by said arms, a cam-guide disposed vertically near said drum, and -means operatively connecting said wing with said cam-guide whereby variable lateral movements are imparted to said wing by the vertical movements of said arms for folding one of the bottom-end flaps of each bag as it is carried around by said drum.

2. In a flap folder for paper bags, the combination with the drum which carries the bags during the bottoming operations, and a driven press roll which receives the bags from said drum, of an eccentric device carried by the shaft of said press roll, rocking levers actuated by said eccentric, a flap-folding member adapted to be moved in opposite directions in a vertical plane, said member having a wing which successively engages the bottom-end flaps of the bags as they are carried around by said drum, and a vertically disposed cam-guide having an irregular face adapted to impart variable lateral movements to said wing for effecting the folding of one of said flaps.

3. In a flap folder the combination with a drum which carries the paper bag during the bottoming operations, of a vertically rocking member, a wing pivotablysupported by said memberadapted to engage one of the bottom-end flaps of the bag and to fold said flap against the adjacent portion of the bag, a vertical guide for effecting variable movements of said wing during the folding periods, an eccentric device for operating said member, and a slotted lever interposed between the eccentric device and said member for varying the length of the strokes of said member.

In testimony whereof I afiix my signature.

JOSEPH W. TAGGART. 

